Blue-Emitting Small Silica Particles Incorporating ZnSe-Based Nanocrystals Prepared by Reverse Micelle MethodReportar como inadecuado




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Journal of Biomedicine and Biotechnology - Volume 2007 2007, Article ID 52971, 7 pages

Research Article Photonics Research Institute, National Institute of Advanced Industrial Science and Technology AIST, Kansai Center, 1-8-31 Midorigaoka, Ikeda, Osaka 563-8577, Japan

Received 16 May 2007; Revised 17 December 2007; Accepted 24 December 2007

Academic Editor: Marek Osinski

Copyright © 2007 Masanori Ando et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

ZnSe-based nanocrystals ca. 4-5 nm in diameter emitting in blue region ca. 445 nm were incorporated in spherical small silica particles 20–40 nm in diameter by a reverse micelle method. During the preparation, alkaline solution was used to deposit the hydrolyzed alkoxide on the surface of nanocrystals. It was crucially important for this solution to include Zn2+ ions and surfactant molecules thioglycolic acid to preserve the spectral properties of the final silica particles. This is because these substances in the solution prevent the surface of nanocrystals from deterioration by dissolution during processing. The resultant silica particles have an emission efficiency of 16% with maintaining the photoluminescent spectral width and peak wavelength of the initial colloidal solution.





Autor: Masanori Ando, Chunliang Li, Ping Yang, and Norio Murase

Fuente: https://www.hindawi.com/



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